Abstract

All the loads in the real world are dynamic loads and structural optimization under dynamic loads is very difficult. Thus the dynamic loads are often transformed to static loads by dynamic factors, which are believed equivalent to the dynamic loads. However, due to the difference of load characteristics, there can be considerable differences between the results from static and dynamic analyses. When the natural frequency of a structure is high, the dynamic analysis result is similar to that of static analysis due to the small inertia effect on the behavior of the structure. However, if the natural frequency of the structure is low, the inertia effect should not be ignored. Then, the behavior of the dynamic system is different from that of the static system. The difference of the two cases can be explained from the relationship between the homogeneous and the particular solutions of the differential equation that governs the behavior of the structure. Through various examples, the difference between the dynamic analysis and the static analysis are shown. Also dynamic response optimization results are compared with the results with static loads transformed from dynamic loads by dynamic factors, which show the necessity of the design considering dynamic loads.

주제어

#동하중   #정하중   #고유진동수   #모드해석   #일반해   #특수해   #등가정하중법   #동적반응최적설계  

저자의 다른 논문

참고문헌 (14)

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이 논문을 인용한 문헌 (1)

1. Jang, Hwan-Hak ; Lee, Hyun-Ah ; Park, Gyung-Jin 2009. "Preliminary Study on Linear Dynamic Response Topology Optimization Using Equivalent Static Loads" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A, 33(12): 1401~1409  원문보기 상세보기